Philadelphia's Action News 6 reports police converged on the city's Fairmount Park Monday afternoon after Stephens was reportedly sighted there. Police did not confirm the sightings, but nine schools in the area were placed on lockdown as a precaution.

"He could be nearby. He could be far away or anywhere in between," FBI agent Stephen Anthony said earlier in the day in Cleveland, as the search for Stephens expanded to neighboring states.

Police also received a "ping" from Stephens' cellphone in Erie, Pa., on the opposite corner of the state from Philadelphia.